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DTSTART:20170326T030000
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DTSTART:20171029T020000
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DTSTAMP:20260428T112227Z
UID:57e270bd0b5d1287576553@ist.ac.at
DTSTART:20170517T123000
DTEND:20170517T133000
DESCRIPTION:Speaker: Matthew Hahn\nhosted by Nick Barton\nAbstract: Phyloge
 nomics has largely succeeded in its aim of accurately inferring species tr
 ees\, even when there are high levels of discordance among individual gene
  trees. These resolved species trees can be used to ask many questions abo
 ut trait evolution\, including the direction of change and number of times
  traits have evolved. However\, the mapping of traits onto trees generally
  uses only a single representation of the species tree\, ignoring variatio
 n in the gene trees used to construct it. Recognizing that genes underlie 
 traits\, these results imply that many traits follow topologies that are d
 iscordant with the species topology. As a consequence\, standard methods f
 or character mapping will incorrectly infer the number of times a trait ha
 s evolved. In this talk I give examples from our work on wild tomatoes\, b
 ats\, and mosquitoes of how discordant genealogies can lead to misleading 
 inferences about the frequency of convergent evolution.
LOCATION:I22 Lakeside View (I22.01)\, ISTA
ORGANIZER:cfraisse@ist.ac.at
SUMMARY:Matthew Hahn: Phylogenomics and the Procrustean bed of the species 
 tree
URL:https://talks-calendar.ista.ac.at/events/265
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